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Finding the Fourth Proportional to 208,857.40, 313,286.10 and 68,630.20

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Solution

The fourth proportional to 208,857.40, 313,286.10 and 68,630.20 is: 102,945.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    208,857.40 : 313,286.10 = 68,630.20 : x
  2. Step 2: Convert to fraction form
    208,857.40/313,286.10 = 68,630.20/x
  3. Step 3: Cross multiply
    208,857.40x = 313,286.10 × 68,630.20
  4. Step 4: Simplify right side
    208,857.40x = 21,500,887,700.22
  5. Step 5: Solve for x
    x = 21,500,887,700.22/208,857.40
  6. Step 6: Final answer
    x = 102,945.30

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.